Abstarct: The quantitative and qualitative depletion of water resources and the pollution of surface and ground water are very overwhelming today. The growth of the population and the increase in living standards have led to an increase in the withdrawal of water from the coastal aquifers and as a result the infiltration of salt water into the aquifers. Increasing the range of saltwater infiltration has many environmental effects in the aquifer and the coastal area. In this study, the aquifers around Maharlo lake were investigated in terms of salt water infiltration from the lake by chemical analysis method. To do this, 38 water samples were taken from different aquifers around the lake, and various anions and cations, EC, TDS, etc. were measured. In addition, a number of samples were collected to measure heavy mextal contamination. The results showed that Maharlo lake had an influence upon the water of surrounding aquifers and caused their water to become salty depending on salinity, distance from the lake, the depth of the well and the amount of water abstraction. Also, the results indicate that the aquifers in the northern part of the lake were more affected by saltwater intrusion than the southern part. In addition, the environmental impact of the lake on the aquifers has made groundwater unsuitable for drinking. The pollution indicators including the water quality index (WQI) and the heavy mextal pollution index (HPI) were also investigated. According to the results, the aquifers are bad to very good in terms of water quality, and baxsed on pollution index it was found groundwater samples are currently uncontaminated with potentially toxic elements.